简介:Inordertosolvetheproblemsrelatedwithprocessinglow-qualityLiaohehighlysourcrude,theLiaohePetrochemicalCompanyhasexploredthepossibilityinoptimizingtheprocessingofhighlysourcrudebyadoptingdifferentprocessschemesdependinguponthepropertiesofthehighlysourcrude.TheLiaohenaphthenic-basecrudeoilwithlowfreezingpointisearmarkedformanufactureofnaphtheniclubeoilsandheavytrafficpavingasphalt,whiletheextra-heavyLiaohecrudewithhighacidnumberisrouteddirectlytodelayedcokingunitcoupledwithcorrespondingcorrosionpreventingmeasures,resultingintacklingtheproblemofequipmentcorrosionarisingfromrefiningofLiaohehighlysourcrudetoobtainlightdistillatesfromLiaoheheavycrudethroughashortprocessscheme.
简介:为了评估antithyroidantibodie层次,有甲状腺疾病的526个病人和292健康的意义,从Yuci使区域遭到,山西省,中国,被学习。浆液层次为甲状腺荷尔蒙受体抗体(TRAb)被决定,microsomal抗体(TMAb)和thyrogiobulin抗体(TGAb)。在病人之中,为榴状的甲状腺肿和甲状腺腺瘤,坟的疾病,和Hashimoto的甲状腺炎的百分比分别地是44.1%,19.6%和17.7%。到男性的女性的比率是2.0~15.6个.Antibody积极的病人因为TMAb,TGAb和TRAb为Hashimoto的甲状腺炎作为94.6%,76.3%和20.4%可检测,并且40.0%,30.0%和90.3%为格雷夫斯的疾病。为描绘疾病和forusingas的流行病学的基础在结论,在Hashimoto的甲状腺炎和自发的甲状腺机能减退的TGAb/TMAb的在坟的疾病的TRAb的高水平,和那些是有意义的为在单个病人的恶化的预示的指示物。
简介:我们考虑在位于没有规模的网络的联合振荡器的synchronizability上聚类系数的效果。聚类系数瞄准一个高度聚类的没有规模的网络模型,的价值的分析结果Holme-Kim模型被获得,并且在网络synchronizability之间的关系和聚类的系数被报导。Thesimulation结果强烈建议那越多聚类网络,越poorerthesynchronizability。
简介:有一双chelatingaminotropone的Ti建筑群的合成和结构[在上]ligand被报导了。功能的理论(DFT)学习的密度的计算建议当与methylaluminoxane(毛)激活时,二度(aminotropone)Ti建筑群为olefinic单体的聚合有高潜力。这些理论研究也证明活跃种类通常从二度(aminotropone)导出Ti催化剂与用二度(phenoxyimine)生产的那些相比拥有更高的electrophilicity自然作为高效石蜡聚合催化剂被知道的Ti建筑群(TiFI催化剂)。二度(aminotropone)Ti催化剂产生比TiFI有更高的electrophilicity的催化地活跃的种催化剂。
简介:AfacileandselectiverouteforO-alkylationofhighlyhydrophilic,multifunctionalhyperbranchedpolyglycerol(PG)undernon-aqueousphasetransfercatalyzedconditionsindimethylsulfoxidewasdeveloped,throughwhichseveralkindsofgroupswereintroducedontoPG.
简介:Theultrafastfiberlaserhasattractedagreatdealofresearchinterestduetoitslowcost,highefficiency,andsimplemaintenance.Opticalpassivedevicesarevitalpartsofafiberlaser.Inordertoobtainafiberlaserwithhighquality,opticalpassivedeviceswithhighperformancearerequired.Here,wedemonstrateahighlyintegratedopticaldevicewiththecombinationofasaturableabsorber(SA),coupler,isolator,wavelengthdivisionmultiplexer,anderbium-dopedfiber.Thebuilt-inSAhasamodulationdepthof7%andcanwithstandhighpumppowerduetotheuniquestructureoftheproposeddevice.Theproposeddeviceisappliedtoanultracompactfiberlaser,whichgreatlysimplifiesthelaserstructureandreducesthesizeoftheproposedlaser.Thecentralwavelength,pulseduration,repetitionrate,andsignal-to-noiseratiooftheoutputsolitonare1560nm,1.06ps,25.8MHz,and50dB,respectively.Theproposeddevicehasgreatpotentialforapplicationinhigh-powerandhigh-frequencyfiberlasers.Theproposedultracompactfiberlaserhasimportantapplicationsinopticalcommunication,opticalsensing,opticalfrequencycombs,andmicromachining.
简介:Forthestabilityrequirementofnumericalresultants,themathematicaltheoryofclassicalmixedmethodsarerelativelycomplex.However,generalizedmixedmethodsareautomaticallystable,andtheirbuildingprocessissimpleandstraightforward.Inthispaper,basedontheseminalideaofthegeneralizedmixedmethods,asimple,stable,andhighlyaccurate8-nodenoncompatiblesymplecticelement(NCSE8)wasdevelopedbythecombinationofthemodifiedHellinger-Reissnermixedvariationalprincipleandtheminimumenergyprinciple.Toensuretheaccuracyofin-planestressresults,asimultaneousequationapproachwasalsosuggested.NumericalexperimentationshowsthattheaccuracyofstressresultsofNCSE8arenearlythesameasthatofdisplacementmethods,andtheyareingoodagreementwiththeexactsolutionswhenthemeshisrelativelyfine.NCSE8hasadvantagesoftheclearingconcept,easycalculationbyafiniteelementcomputerprogram,higheraccuracyandwideapplicabilityforvariouslinearelasticitycompressibleandnearlyincompressiblematerialproblems.ItispossiblethatNCSE8becomesevenmoreadvantageousforthefractureproblemsduetoitsbetteraccuracyofstresses.
简介:Aneodymiumdopedyttriumaluminumgarnet(Nd:YAG)transparentceramicwasfabricatedbyasolidstatereactionmethodusingcommercialα-Al2O3,Y2O3,andNd2O3powdersasstartingmaterialsandtetraethylorthosilicate(TEOS)assinteringaid.ThemorphologyandmicrostructureofthenanopowdersandtheNd:YAGtransparentceramicwereinvestigated.ThefullydenseNd:YAGceramicwithanaveragegrainsizeof~20μmwasobtainedbyvacuumsinteringat1720°Cfor12h.Fewporesandgrain-boundaryphaseswereobserved.Thein-linetransmittanceoftheceramicwas81.5%at1064nm.